I have an old trackball marble FX mouse. It is the wired type terminating in a PS/2 connector. I would like to use this mouse in my new Windows 7 laptop which is equiped with USB ports only. In anticipation of a potential problem, I procured a PS/2 to USB adaptor. But the mouse is not recognized by Windows 7 as a new device. I have already downloaded the mouse software from Logitech. The mouse does not operate the cursor et al. Any ideas out there?